I was thinking about replacing the 20 and 10 minute additions with something else. Any thoughts on using Bravo?

My other options are Amarillo, Centennial, & Cascade. I was really hoping to do an all columbus beer but may need to shift gears. Any feedback or ideas would be appreciated.

If you want all-Columbus for your late adds, I'd do 1/2 ounce at 15 minutes, 1/2 ounce at flameout, then use a small 60-minute addition of Bravo to bring up your total IBU's to your target range. Otherwise, any of the Cent/Amarillo/Cascade will work damn well with the Columbus and orange peel. Really, you literally can't go wrong with any combo of those.

Great thanks! I will probably go with your suggestion of adding a bit of Bravo as a normal 60 minute addition to get me just above 30 IBUs. I haven't decided if I am going to do the orange zest or not but I am hoping it will be good either way.

This beer has been carbing in the keg for a few days and I had a quick taste yesterday. Damn it is overly bitter and pungent. There is no malt character for the hops to hide behind and it is in your face, almost lip puckering bitterness. My efficiency was very bad for this batch so my OG was only 1.043 with 33 IBUs. I had no idea that 33 IBUs could be so over the top. Not sure this beer will be very drinkable unless it mellows a lot in a couple of weeks. Now I know what all columbus can do in a light bodied low OG beer.

Keep in mind, for future batches, that orange peel in the boil will give some bitterness. Also, it's still early, let the beer clear completely before you start drinking it. Yeast in suspension will give the beer some extra "bite." Using gelatin, isinglass, etc. will speed the process.